Hi there, I am Dr. Deepak, I work in Emergency Department, where I see many patients with injury to their head. As you mentioned you had injured your head pretty hard 3 days ago, and whole left side was bruised and you bleed from nose, you had a horrible headache the next day, and blurring of vision which has now gone and you can properly. I feel you had sustained minor injury to your head, I can say that as 1. you didn t had any dizzy feeling. 2. You didn t had vomiting even though you had nausea. 3. You didn t loose consciousness. 4. You are not feeling any numbness or weakness of any one side of your body 5. You are not having any blueish discoloration around your eyes and behind the ear 6. You are not having any trouble with walking. And the most important thing is you are pretty much okay right now. If you have any of the above mentioned problems then it will better to show to a doctor, but it is unlikely for you to have that as it is already 3 days over. You probably had headache because of your nasal sinus got injured and it got block, and with due time as your sinuses opened your headache has gone. For the time being you can take some pain killer if pain persist and apply some ice pack. Thank you Hope your concern was dealt with and hope you have a speedy recovery.